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** Copyright (C) 2013 Klaralvdalens Datakonsult AB (KDAB)
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#include "tcSelfRestarter.h"

#include <QCoreApplication>
#include <QDir>
#include <QProcess>

class TcSelfRestarter::Private
{
public:
    Private(int argc, char *argv[])
        : restartOnQuit(false)
    {
        executable = QString::fromLocal8Bit(argv[0]);
        workingPath = QDir::currentPath();
        for (int i = 1; i < argc; ++i)
            args << QString::fromLocal8Bit(argv[i]);
    }

    Private()
        : restartOnQuit(false)
    {
        executable = qApp->applicationFilePath();
        workingPath = QDir::currentPath();
        args = qApp->arguments().mid(1);
    }

    ~Private()
    {
        if ( restartOnQuit )
        {
            QProcess::startDetached(executable, args, workingPath);
        }
    }

    QString     executable;
    QStringList args;
    bool        restartOnQuit;
    QString     workingPath;
    static TcSelfRestarter* instance;
};

TcSelfRestarter* TcSelfRestarter::Private::instance = nullptr;

TcSelfRestarter::TcSelfRestarter(int argc, char *argv[])
    : d(new Private(argc, argv))
{
    Q_ASSERT_X(!Private::instance, Q_FUNC_INFO, "Cannot create more than one TcSelfRestarter instance");
    Private::instance = this;
}

TcSelfRestarter::~TcSelfRestarter()
{
    Q_ASSERT_X(Private::instance == this, Q_FUNC_INFO, "Cannot create more than one TcSelfRestarter instance");
    delete d;
    Private::instance = 0;
}

void TcSelfRestarter::setRestartOnQuit(bool restart)
{
    Q_ASSERT_X(Private::instance, Q_FUNC_INFO, "TcSelfRestarter instance must be created in main()");
    if (Private::instance)
        Private::instance->d->restartOnQuit = restart;
}

bool TcSelfRestarter::restartOnQuit()
{
    return Private::instance ? Private::instance->d->restartOnQuit : false;
}
